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遗传算法“早熟”现象的改进策略 被引量:22
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作者 周洪伟 原锦辉 张来顺 《计算机工程》 CAS CSCD 北大核心 2007年第19期201-203,共3页
改善遗传算法中的"早熟"现象可以通过提供某种机制以恢复群体多样性。基于这种思想,该文参照其他遗传算法改进策略,从弥补丢失模式、提高模式浓度出发,提出了通过保持模式的多样性来保证群体多样性的方法。为了衡量改进策略... 改善遗传算法中的"早熟"现象可以通过提供某种机制以恢复群体多样性。基于这种思想,该文参照其他遗传算法改进策略,从弥补丢失模式、提高模式浓度出发,提出了通过保持模式的多样性来保证群体多样性的方法。为了衡量改进策略的有效性,引入了模式再生期望值的概念,并利用模式再生期望值的分析方法分析了一种实用的改进策略。实验数据证明了该策略的有效性。 展开更多
关键词 遗传算法 早熟 模式权值 模式再生期望值
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Comprehensive Assessment of Seawater Quality Based on an Improved Attribute Recognition Model 被引量:4
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作者 ZHANG Libing CHENG Jilin +1 位作者 JIN Juliang JIANG Xiaohong 《Journal of Ocean University of China》 SCIE CAS 2006年第4期300-304,共5页
The attribute recognition model (ARM) has been widely used to make comprehensive assessment in many engineering fields, such as environment, ecology, and economy. However, large numbers of experiments indicate that th... The attribute recognition model (ARM) has been widely used to make comprehensive assessment in many engineering fields, such as environment, ecology, and economy. However, large numbers of experiments indicate that the value of weight vector has no relativity to its initial value but depends on the data of Quality Standard and actual samples. In the present study, the ARM is enhanced with the technique of data driving, which means some more groups of data from the Quality Standard are selected with the uniform random method to make the calculation of weight values more rational and more scientific. This improved attribute recognition model (IARM) is applied to a real case of assessment on seawater quality. The given example shows that the IARM has the merits of being simple in principle, easy to operate, and capable of producing objective results, and is therefore of use in evaluation problems in marine environment science. 展开更多
关键词 comprehensive assessment seawater quality improved attribute recognition model
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